Transfering add-ons between blender builds
Once you get a new version of Blender you will see this welcome screen:



Here in bottom of this window you will see something like "Load 2.xx Settings". If you press on it, your settings, add-ons and configs will be properly copied.

What if don't you see this button on the welcome screen (pressed save settings before)?

Navigate to folder:

Linux

~/.config/blender


Mac

/Users/username/Library/Application Support/Blender/


Windows

%APPDATA%(Program files)\Blender Foundation\Blender


And remove folder with name equal newest version number. That makes blender launches "like first time", and you will get  "Load 2.xx Settings" button.